The problem with a conventional windshield on some bikes like the C50 is that it's too far from the rider. It's funny but same windshield on a Harley Heritage Softtail that works well for it has serious buffeting problems on a Harley Road King. You can get a much taller windshield but you are going to have a tough time seeing through it if it rains/drizzles, you have to be able to see over it comfortably. The second problem of having a windshield that's mounted so far foward is that it makes the bike feel unstable, all the weight and pressure that's forward of the center of axis, not a clever design. Small side winds can make the steering interesting.
The solution to the buffeting is to use lowers. Some people believe this works by preventing wind from coming up from the under the windshield. My belief is that it works by making the windshield bigger and lowering the turbulance/buffeting sweet spot from head level. Does nothing for the handling.
A complete solution is Corbins Trimtab, it's small, puts the pressure behind the center of axis, diverts airflow above your head and allows you to have an open view of the road so it's a perfect solution. The problem is that it's ugly, at least to me and expensive at $800.
http://www.corbin.com/suzuki/volusiatrimtab.shtml